Brush



Oct. 13, 1953 G. K. DAVIS, JR

BRUSH Filed Sept. 10, 1947 zzvmvrox George K Davis Jr Attorney PatentedOct. 13, 1953 OFFICE BRUSH George K. Davis, J r., Long Beach, Calif.Application September 10, 1947, Serial No. 773,285 1 Claim. "(01. 15-198) (Granted under Title 35, U. S. Code "msec. 266) This inventionrelates to brushes, and more particularly to that feature of brusheshaving to do with the securing in the brush body of the bristles oftufts of brush material.

It is an object of this invention to provide a brush in which the tuftsof brush material may be quickly and easily replaced when they are worn.

It is another object of this invention to provide a brush which mayutilize for its bristles short lengths of wire cable, thereby cheapeningthe manufacture of the brush.

In accordance with these and other objects which will become apparent inthe following specification, the brush of the instant invention isconstructed of a tubular body having a plurality of slots therein. Tuftsof brush material are placed in the slots with the ends of the bristlesextending outward of the body and the bights disposed within the bodybetween the two adjacent slots through which the ends project. A ring orcap is secured over the edges of the slots to secure the brush tuftswithin the body.

Preferred embodiments of the invention will now be described inconnection with the accompanying drawings, wherein:

Fig. 1 is an end view of a brush. 7

Fig. 2 is an exploded perspective view showing details of construction.

Fig. 3 is an end view of a modified form of brush constructed inaccordance with this invention; and

Fig. 4 is a side view of the brush body of Fig. 3.

Referring to the drawing, ll designates a tubular body in the form of aright circular cylinder closed at one end by an end wall l2, preferablyformed integral therewith. Projecting into the body i l and preferablyformed integral with the end wall l2, is an axial boss I3, centrallybored at [4 to provide mounting means for a brush rotating shaft (notshown). From the edge I5 of the body II which is opposite to the endwall I2, extend a plurality of evenly distributed helical slots 2l-28.The width of the slots is sufficient to accommodate tufts of brushmaterial, exemplified by the tuft 3|. The brush tuft 3| preferablyconsists of a short length of stranded resilient material such as wirecable.

The brush is assembled by placing tufts of brush material 3| in adjacentslots 21-28 with the ends 32 of the tuft extending outward of the brushand the bight 33 disposed within the body H between adjacent slots. Theresiliency of the brush material keeps the bight 33 pressed against theperiphery of the boss [3, thereby providing i r l 2 three securingpoints of the brush tuft. These points are: the adjacent slots throughwhich the brush ends extend, and

the periphery of boss l3, against which the bight 33 presses.

It may be preferred to stagger the brush tufts 3| asthey are insertedinto the slots i.- l28. In this event, the first tuft 3! is insertedinto slots 2i and 22. The next tuft is inserted into slots 23 and 24.The next tuft is inserted into slots 25 and 26. The next tuft isinserted into slots 21 and 28, thereby completing the first layer ofbrush material. The next layer begins by inserting a tuft 3| into slots22 and 23 and is completed by inserting the next three tufts into slots24-25, 26-41, and 28-41, respectively. In this fashion the tuft layersare built up until they fill the entire length of the slots.

A cap 35, having an annular groove 36 on the inner face thereof, is thenplaced over the edge l5 of the body H, with the edge residing in thegroove 33. The cap 35 is secured to the body H by means of screws 31extending through holes 38 in the cap and into tapped holes 39 in theboss l3. The cap 35 is provided with a center hole 4| registering withthe bore Hi to accommodate a rotatable brush mounting shaft.

The slots 2I--23 are made helical, to produce a more effective brushingaction as the brush is rotated.

The modified form of brush illustrated in Figs. 3 and 4 has acylindrical body 5i, which is not provided with an axial boss. Thesecuring function of the boss l3 of Figs. 1 and 2 is fulfilled, in thismodified form, by the bights 52 of the brush tufts 53. As seen in Pig. 3the bights 52 of the brush tufts bear against each other in backto-backrelation. An axial mounting bore 54 extends part way into the body 5|,stopping short of the slots 55, as seen in Fig. 4.

To retain the brush tufts 53 in position, and to strengthen the slottedwall of the cylinder 5|, a retaining ring 56 is slipped over the edge 51of the body 5! from which the slots 55 extend. Ring 56 is held in placeby means of an annular groove 58, formed in the body 5! adjacent theedge 51.

From the foregoing description, it will be seen that there has beendescribed a manner of brush construction which produces, economicallyand quickly, an improved brush, the bristles of which may be readilyreplaced when worn.

It will be understood that this invention may be made and utilized inmany suitable shapes and sizes, and that various modifications andchanges may be made in this invention without departwhich determine theshape.

a plurality of mutually intersecting diametrical;

slots extending longitudinally inwardly from one end and through asubstantial portion of the length thereof whereby said body portioncisidievided into a plurality of elongated circular sectors each having across-sectional area which substantially less than the cross sectional.area;

of the body at the opposite end thereof, said body being formed ofmatei'ialllhas= spring, characaeristics when shaped in the form of saintelongated sectors, a plurality of tufts of resilient brush materialwoven, yieldably into .said; slots,

saidtufts having the ends thereofs-extendingasum stantially radially ofthe body'and' hayingthe-intermediate portions: thereof .bighted withinadjacent slots, the bights of said brush tuits bear.- 25

ing against. each; otherxin. back-to-baek relation within. said: may, apre-formed annular groove on the. exterior of said. bady'near said;firsta-men. tioned end thereof; andiinterrupted by saidislota.

said groove having a rectangular cross section, and a retaining snapring releasably seated in said interrupted groove for holding said tuftsin said slots, said ring having a rectangular cross section matchingthat of the groove for free seating of the ring therein, said ring beingrigid and havingzan inner diameter-approximately equal to fillerdiameimt0f the body." atrthe bottom. of said groove and less than the exteriordiameter of the .hmiy between the groove and said end of the bodyadjacent thereto both before and after the ring is seated in the groove,said segments and tufts being yieldahly compressible to permit slippingof-th'e ring onto the exterior surface of the body followed-by snapaction movement of the ring into. the gr ov GEORGE K. DAVIS, JR.

References Cited in the file of this patent UNITED STA'JZES PATENTSNumber Name Date 282,782 Sahlstrom Aug.'7', 1- 883 3711975 Rhodes Oct.25, I387 1,927,747 Justice Sept; 19 ,1933 2,084,360 Spruzaola- June22;1937 2.1102378 Gerhard; Dec. 1-4, 1937 2115,0203 Kransfelder Apr;26,1938

